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from decimal import Decimal
import pytest
import sqlalchemy as sa
from sqlalchemy_utils.aggregates import aggregated
@pytest.fixture
def Catalog(Base):
class Catalog(Base):
__tablename__ = 'catalog'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
@aggregated(
'categories.products',
sa.Column(sa.Integer, default=0)
)
def product_count(self):
return sa.func.count('1')
categories = sa.orm.relationship('Category', backref='catalog')
return Catalog
@pytest.fixture
def Category(Base):
class Category(Base):
__tablename__ = 'category'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
catalog_id = sa.Column(sa.Integer, sa.ForeignKey('catalog.id'))
products = sa.orm.relationship('Product', backref='category')
return Category
@pytest.fixture
def Product(Base):
class Product(Base):
__tablename__ = 'product'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
price = sa.Column(sa.Numeric)
category_id = sa.Column(sa.Integer, sa.ForeignKey('category.id'))
return Product
@pytest.fixture
def init_models(Catalog, Category, Product):
pass
@pytest.mark.usefixtures('postgresql_dsn')
class TestAggregateOneToManyAndOneToMany:
def test_assigns_aggregates(self, session, Category, Catalog, Product):
category = Category(name='Some category')
catalog = Catalog(
categories=[category]
)
catalog.name = 'Some catalog'
session.add(catalog)
session.commit()
product = Product(
name='Some product',
price=Decimal('1000'),
category=category
)
session.add(product)
session.commit()
session.refresh(catalog)
assert catalog.product_count == 1
|
